Read the sentence. check the type of ungrammatical-sounding english that it illustrates. jane has swam the course several times.

It should be

Jane swam the course several times.

Incorrect usage of helping verb 'has' makes it sound ungrammatical or the wrong usage of the verb 'swam' with has.

"Jane swam the course several times." is the correct form or it can be

"Jane has swum the course several times".

Explanation:

There is a grammatical flaw in the sentence due to the unnecessary usage of the helping verb 'has' which makes it superfluous. If the helping verb has to be remained intact then the past participle form of verb i.e. 'swum' should be used. Thus, there can be two possible answers as given above.

answer: group ii. when the root is a full word except for a final e, the forms usually are spelled with -able.

explanation: the word will be deplorable. -able will be used with the word 'deplore-'. the group ii is when the root is a full word except for a final e, the forms usually are spelled with -able is used for the word deplore- because the word deplore- has 'e' at the end of it.